Soft x-ray synchrotron radiation spectroscopy study of SrMn1-xRuxO3 perovskites (0≤x≤1).

The electronic structures of SrMn_1-xRu_xO₃ (0⩽x⩽1) have been investigated by employing soft x-ray absorption spectroscopy (XAS). The measured Mn 2p XAS spectra for SrMn_1-xRu_xO₃ show that the valence states of Mn ions change monotonically from Mn⁴⁺ for x=0 to ∼Mn³⁺ for x=0.8, suggesting that the valence states of the substituted Ru ions are higher than 4+. The Ru 3p XAS spectra of SrMn_1-xRu_xO₃ show the existence of pentavalent Ru⁵⁺ ions for the low x value. The measured O 1s XAS spectra also support these findings. [ABSTRACT FROM AUTHOR]